CHECK_C_SOURCE_COMPILES("#include <sys/types.h>
#include <sys/acl.h>
int main(void) { return ACL_TYPE_EXTENDED; }" HAVE_DECL_ACL_TYPE_EXTENDED)

ELSEIF(HAVE_DECL_ACL_TYPE_EXTENDED AND
               HAVE_MEMBERSHIP_H AND
               HAVE_ACL_ADD_FLAG_NP AND
               HAVE_ACL_CLEAR_FLAGS_NP AND
               HAVE_ACL_GET_FLAGSET_NP AND
               HAVE_ACL_GET_LINK_NP AND
               HAVE_ACL_SET_LINK_NP AND
               HAVE_MBR_UID_TO_UUID AND
               HAVE_MBR_GID_TO_UUID AND
               HAVE_MBR_UUID_TO_ID)